We will recruit 564 (30 phase 1, 534 phase 2) nonsmoking adult support persons throughout the entire state of Minnesota using mass media and outreach approaches. They must be interested in supporting a current cigarette smoker who is 18 years of age or older and a resident of Minnesota. In phase 2, support persons will be randomly assigned to receive written self-help materials only (N=237; control group) or to receive the same written materials plus three, 15-20minute telephone-based sessions (N=237; experimental group) stratified according to whether or not the support person lives in the same residence as their smoker. The written materials will be mailed to the support person?s home. These materials will include a QUITPLAN Helpline toll-free number developed specifically for this study and a study reference code that reflects the support person's group assignment and includes the support person?s study ID number (e.g., BLUE 012) that the smoker should provide to the QUITPLAN Helpline intake staff if and when he/she decides to call. The primary dependent variable will be the proportion of support persons? smokers who call the QUITPLAN Helpline anytime during the interval from randomization through week 26, documented by the QUITPLAN Helpline intake staff. (using the study reference code).